William Parente of Garden City, Long Island killed his wife, Betty and two daughters, Stephanie, 19, and Catherine, 11, and then committed suicide at a hotel in Towson, Md., police said. According to the police, no motive has been established in the incident. The four were found dead inside a 10th-floor room at a Sheraton Hotel on Monday and none were shot or stabbed. Baltimore County Police have confirmed they received "the cause and manner of death" rulings from the office of the chief medical examiner in the investigation.